Home / 30,707.89-42,376.80-17,279.15

Finding the Fourth Proportional to 30,707.89, 42,376.80 and 17,279.15

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Solution

The fourth proportional to 30,707.89, 42,376.80 and 17,279.15 is: 23,845.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,707.89 : 42,376.80 = 17,279.15 : x
  2. Step 2: Convert to fraction form
    30,707.89/42,376.80 = 17,279.15/x
  3. Step 3: Cross multiply
    30,707.89x = 42,376.80 × 17,279.15
  4. Step 4: Simplify right side
    30,707.89x = 732,235,083.72
  5. Step 5: Solve for x
    x = 732,235,083.72/30,707.89
  6. Step 6: Final answer
    x = 23,845.18

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.